25803878399 has 6 divisors (see below), whose sum is σ = 27941477976. Its totient is φ = 23818964520.

The previous prime is 25803878381. The next prime is 25803878413. The reversal of 25803878399 is 99387830852.

It is a de Polignac number, because none of the positive numbers 2^k-25803878399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25803878369) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76342667 + ... + 76343004.

It is an arithmetic number, because the mean of its divisors is an integer number (4656912996).

Almost surely, 2^25803878399 is an apocalyptic number.

25803878399 is a deficient number, since it is larger than the sum of its proper divisors (2137599577).

25803878399 is a wasteful number, since it uses less digits than its factorization.

25803878399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152685697 (or 152685684 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 62.

The spelling of 25803878399 in words is "twenty-five billion, eight hundred three million, eight hundred seventy-eight thousand, three hundred ninety-nine".